Read page 2 and 3 of that pdf you referenced…. It tells you Musk is a cofounder. Ok great you like Batman and Jim Clark.. that says it all…. Most of Jim Clarks companies no longer exist but sure he did a few things in his time. On one of his companies, Marc Andreessen is generally considered the creator of Netscape, even though much of the source was actually created by other developers working on the Mosaic project but Jim did help commercialize the project. Anyway I’ll go away now.